REPL: make paste work in search mode

[rfourquet]

No description provided.

[KristofferC]

Note that the example in #29347 can be reproduced without using paste at all so it is not an only paste issue, or?

[rfourquet]

Actually, I couldn't reproduce the issue without using paste at all, so was not sure... (maybe it can depend on the content of the history file?)
On the other hand, pasting triggers reliably the bug, even if I paste non-gibberish (which matches something in history). If you confirm, I will remove the "fix ..." from the title.

[KristofferC]

You need to write something that gives zero results in the reverse search. Å did it for me

(reverse-i-search)`Å': ┌ Error: Error in the keymap
│   exception =
│    BoundsError: attempt to access ""
│      at index [0]
│    Stacktrace:

So, Ctrl-R, Å, Ctrl-R was my input there

[rfourquet]

Ok I can reproduce, so there seems to be two bugs here!

[rfourquet]

I indentified the problem, I will make a fix for the second bug.

[rfourquet]

For reference, the bug was introduced in #25646 which introduced the keep keyword to readuntil.